All Developer Tools

Generate valid fictional Dutch BSN numbers with elfproef validation.

Generate fictional US Social Security Numbers (XXX-XX-XXXX format).

Generate fictional Dutch IBAN numbers with modulo 97 validation.

Generate fictional Belgian IBAN numbers (KBC, Belfius, BNP Paribas Fortis).

Generate fictional German IBAN numbers (Commerzbank, ING-DiBa, Postbank).

Generate fictional French IBAN numbers (BNP Paribas, Société Générale).

Generate fictional Spanish IBAN numbers (Santander, BBVA, CaixaBank).

Generate fictional British IBAN numbers (Barclays, Lloyds, HSBC, NatWest).

Generate realistic fictional email addresses for 8 countries.

Generate fictional addresses with correct postal code formats for 8 countries.

Generate culturally authentic fictional names for 8 countries.

Generate fictional phone numbers with correct country dial codes.

Generate cryptographically random UUID v4 identifiers (GUID) per RFC 4122.

Generate strong random passwords with customizable character sets.

Generate fictional dates of birth for specific age ranges.

Generate fictional credit card numbers that pass Luhn algorithm validation.

Generate fictional VAT numbers for NL, DE, BE, FR, ES, UK and IT.

Generate fictional business registration numbers: KVK, EIN, Companies House, HRB and more.

Generate fictional vehicle license plates for 8 countries.

Generate random MAC addresses for network testing.

Generate random IPv4 and IPv6 addresses for network testing.

Generate complete multi-field test datasets in bulk and export to Excel, CSV or JSON.

Validate Dutch BSN numbers using the elfproef algorithm.

Validate IBAN numbers from any country using modulo 97.

Encode or decode Base64 strings. Supports standard and URL-safe Base64.

Beautify, validate and minify JSON directly in your browser.

Convert data between CSV and JSON format with delimiter options.